* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html,
body,
#app,
.wrapper {
    width: 100%;
    max-width: 750px;
    margin: auto;
    height: 100%;
    position: relative;
}
body {
    font-family: 'PingFang SC', "Helvetica Neue", Helvetica, "microsoft yahei", arial, STHeiTi, sans-serif;
}

a {text-decoration: none}

.flex{display: flex;}
.flex .flex-item{
    flex: 1;
}


.el-message-box{
    width:80%;
}